Magnesium hydroxide: Difference between revisions
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JeffEvarts (talk | contribs) (Created page with "{{Compound|chemf=Mg(OH)2|group=salts |mm=58.3|mp=350|density=2.34 |nfpa_h=1 |decomp={{DecompRow|input=Magnesium hydroxide|temp=350|output=MgO}}}} Magnesium hydroxide is a close analogue of calcium hydroxide. ==Uses== ===Primary=== * As an aqueous suspension/solution, it is known as ''Milk of Magnesia'', which has medicinal properties: ** as an antacid ** as a laxative * as a fire retardant ===Other=== ==Natural occurrence== ==Hazards== ==Character== ==Production== =...") |
JeffEvarts (talk | contribs) m (JeffEvarts moved page Magnesium Hydroxide to Magnesium hyydroxide: Magesium hydroxide) |
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Revision as of 17:22, 26 April 2023
| Chemical formula | Mg(OH)2 |
|---|---|
| Molar Mass(g/mol) | 58.3 |
| Density(g/cc) | 2.34 |
| Melting Point(°C) | 350 |
| NFPA 704 |  0
1
0
|
| Thermal Decomposition | Magnesium hydroxide
350°C MgO |
Magnesium hydroxide is a close analogue of calcium hydroxide.
Uses
Primary
- As an aqueous suspension/solution, it is known as Milk of Magnesia, which has medicinal properties:
- as an antacid
- as a laxative
- as a fire retardant
Other
Natural occurrence
Hazards
Character
Production
Extraction
from seawater
- Add calcium oxide or calcium hydroxide to salt water (which contains Mg2+ ions). Calcium hydroxide being more soluble than magnesium hydroxide, the latter precipitates.
Synthesis
from soluble magnesium salts
- Dissolve magnesium chloride or magnesium nitrate in distilled water
- Add calcium oxide or calcium hydroxide
- CaO(s) + H2O + MgCl2(aq) → CaCl2(aq) + MgOH(s)
- Ca(OH)2(s) + Mg(NO3)2(aq) → Ca(NO3)2(aq) + Mg(OH)2(s)